What system does the aircraft rely on for inputs from the Flight Control Unit (FCU) and Multifunction Control Display Units (MCDUs)?

The Auto Flight System is responsible for managing various flight-related functions of the aircraft, including but not limited to autopilot, auto-throttle, and flight management tasks. Inputs from the Flight Control Unit (FCU) and the Multifunction Control Display Units (MCDUs) are integral for this system, as they provide crucial information regarding the aircraft’s flight plan, altitude, speed, and navigation data.

For instance, the FCU allows pilots to set specific parameters such as altitude and headings, while the MCDUs serve as the interface for programming and managing the flight management system. The Auto Flight System processes this data to ensure that the aircraft maintains the desired flight path and can automate responses to changes in flight conditions.

The other options, while related to aircraft operations, do not specifically connect to the inputs and functionalities derived from the FCU and MCDU in the same way. The Navigation System focuses on positioning and routing, the Communication System pertains to information exchange, and the Emergency Control System is designed to handle critical situations rather than routine flight management.